https://devzone.nordicsemi.com/f/nordic-q-a/62628/nrf-52832-the-host-failed-to-obtain-the-serviceHello there The problem I encountered was that when getting the slave service, returning to get the service failed. I used DEBUG to check the p_ble_gattc_evt-&gt;gatt_status in the on_primary_srv_discovery_rsp() function and found that it returned #defineen-USTelligent Community 13Tue, 16 Jun 2020 13:53:25 GMThttps://devzone.nordicsemi.com/thread/255295?ContentTypeID=1Tue, 16 Jun 2020 13:53:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f8a3c651-3db8-40ab-b520-cb7f5e650f41Simon<p>Have you doublechecked that you&#39;ve implemented the service/attribute correctly on the server-side (check out <a href="https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-characteristics-a-beginners-tutorial">ble-characteristics-a-beginners-tutorial</a>&nbsp;how to it)? E.g. check&nbsp;<a href="https://devzone.nordicsemi.com/support-private/support/251400/this">this</a>&nbsp;link, which shows a possible cause for this error. If you&#39;ve checked this, and can&#39;t find any possible causes, please reach out again and I will investigate more.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>